ClojureScript is passed through the Google Closure compiler and you can give various directives to the compiler (e.g. simple, advanced etc.) in order to set how

ClojureScript is passed through the Google Closure compiler and you can give various directives to the compiler (e.g. simple, advanced etc.) in order to set how aggressively the compiler optimizes the code. Medium sized apps' should have an advanced optimized ClojureScript component of 200 - 300 KB after being gzipped. This will, of course, vary depending on your specific app.